SG-DBR激光器波长控制系统的设计与实现

根据宽可调谐SG-DBR激光器的波长调谐特性,研制了一套波长控制系统。系统通过生成并调用“波长-电流”数据查询表,实现对SG-DBR激光器输出波长的调谐控制。系统设计引入了虚拟仪器和单片机技术,达到了降低设备成本、小型化系统的目的。实验证明系统波长控制精度高,波长控制误差不超过±0.02nm。     

微细铣刀铣削方式对PCB板边尺寸影响的研究

微细铣刀主要用于PCB板材的铣削加工。微细铣刀与普通铣刀的主要区别在于长径比大、刚性差及挠性变形大等特点。这些特点使得微细铣刀在铣削加工时存在着一些很难避免的困难问题,如寿命不高、板边尺寸难以控制等。文章研究在经过微细铣刀的逆铣和顺铣方式加工后,PCB板材上下叠板呈现出的尺寸变化规律。     

微型声学产品的可靠性分析

微型声学产品的可靠性问题一直是很重要也很值得关注的问题.随着微型声学产品的发展,各种新工艺的应用,微型声学产品的可靠性问题日益突出.如热可靠性、胶水剥落、引出线断线、焊点脱开等,尝试通过仿真和试验相结合的方法对这些问题进行描述分析.     

高校微课程设计的研究 ——以《大学计算机基础》为例

近年来,微课程成为国内外信息化教学改革的研究热点,笔者基于微课程研究的文献调研,并结合大学计算机基础课程的教学实践构建了高校微课程的设计模式.然后以《大学计算机基础》这门课程为案例对高校微课程的设计进行实践研究.     

Synthesis,characterization and photo-catalytic studies of mixed metal oxides of nano ZnO and SnOx

Novel mixed metal oxides of Zinc and Tin (MZOTO) were synthesized by a simple co-precipitation method. The effect of blending varying compositions of SnO_x (x=1, 2) to ZnO has been evaluated, and it was found that the crystal structure, morphology, optical properties and photo-catalytic behavior were dependent on the percentage of SnO_x. The obtained samples were characterized using XRD, EDAX, FESEM, UV–vis spectroscopy, Photoluminescence, etc. XRD data revealed that the ZnO and SnO_x co-exist as mixture and their structures were found as hexagonal and cubic/orthorhombic respectively. FESEM image intricate about the morphology of the MZOTO prepared in 1:0.5 ratio providing nano flower structures that resemble like Chrysanthemum species. The band gaps of all the obtained MZOTOs were determined from UV–vis reflectance spectra using Kubelka-Munk relation. Photoluminescence emission studies revealed that the recombination of excited e⁻ with the h⁺ of ZnO is greatly influenced by SnO_x nanoparticles. Visible light photo-catalytic activities of MZOTOs were followed spectrophotometrically against the degradation of crystal violet solution. MZOTO2 obtained in the ratio of 1:0.5 shows better catalytic efficiency compared to other samples, degrading crystal violet completely within 40 min. The reusability and free radical trapping experiments were performed to study the performance and mechanism of MZOTO2 as the photo-catalyst. The photo catalytic efficiency of 1:0.5 MZOTO was higher due to the presence of flower-like structures that effectively captivated more photons from the sunlight.     

微型光机电系统及其制作

微型光机电系统 (MOEMS)是将微光学、微电子和微机械系统结合发展出一种新型、宽广的应用领域 ,从早期的分立光学元件与电子电路向独立完整的光学系统发展。阐述了实现MOEMS的 2种技术手段 :光波导和微型光学平台的原理、制作工艺和关键技术 ,在此基础上概要介绍了几种典型的MOEMS系统。最后对其的发展作了展望。     

小额支付业务智能网实现方案

阐述采用智能网的体系架构实现小额支付业务时的技术方案和网络组织方案。     

一种全新的数字货架及能力开放平台的研究与应用

随着数字化时代用户对内容消费要求越来越高,传统的业务运营方式存在若干问题.咪咕公司立足于运营商优势,并借鉴互联网行业领先模式,创造性的提出了数字货架及能力开放平台.本文通过分析实际业务场景来提炼平台需求视图,开展系统设计,最终搭建完成四个核心能力的锻造和一个定制化工具.     

基于Atmega128嵌入式控制器的设计

采用Atmega128单片机设计的嵌入式控制器,模拟量输入通道用Atmega128片内A/D转换器,输出用AD421 D/A转换器,数字量I/O通道配置高速光耦器件.用Iccavr编译器修改OSTaskStkInit()函数及其相关文件,定义数据类型等以实现MicroC/OS-Ⅱ的移植.     

印制电子用纳米油墨开发现状和课题

概述了Ag纳米油墨,Cu纳米油墨和合金纳米油墨等印制电子用油墨的开发现状和课题以及利用ITO纳米油墨的透明导电膜形成。